Josiah s



(Io Hodel.)

' J. s.- DU 1301s.

UNDERGROUND 001131111". 7 No. 287.509. Patented Oct. 30, 1883'.

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UNITED STATES PATENT OFFICE JOSIAH S. DU BOIS, OF OAMD IT, NEXV JERSEY.

UNDERGROUND CONDUIT.

SPECIFICATION forming part of Letters Patent No. 287,509, dated October 0, 188 3.

Application filed June 20, 1883. (No mode.)

To all whom it may concern:

Be it known that I, Josmn S. DU 1301s, of the city of Camden, county of Camden, and State of New Jersey, have invented an Improvement in Underground Conduits, of which the following is a specification.

My invention has reference to underground conduits for electric wires; and it consists in certain improvements upon Letters Patent granted to me February 13, 1883, and numbered 272,221., all of which are fully set forth in the following specification and shown in the accompanying drawings, which form part thereof.

The object of my invention is to so construct the longitudinal pockets and their supports that a smooth continuous surface will be had within said pockets to prevent the insulation of the wires or cables becoming abraded or injured. To attain this I bend the ends of the pockets over and down and clamp the two adjacent ends together by clampingsupports of any suitable construction.

My object, further, is to facilitate the preparation of all of the metal work in the machineshop, and thus obviate the necessity of doing expensive machine-work while laying the eonduit in the ground. In addition to the foregoing, I provide the carriage or motor for laying the wire or ropes with an adjustable arm or carrier to lay the said wires or ropes in the pockets of any row.

In the drawings, Figure 1 is a cross-section of a conduit embodying my invention. Fig. 2 is a perspective view of one of the metal frames for supporting the pockets and rails. Fig. 3 is a section of the pockets and the clamping-supports 011 line 00 00. Fig. 4 is a side elevation of one of the supporting-brackets for the pockets. Fig. 5 is a perspective view of one section of the pockets. Fig. 6 is a crosssection of a modified form of the clamping and supporting bracket, and Fig. 7 is a side elevation of the carriage or motor with the ad justable arm.

A are U shaped metal frames, which are provided with one or more extensions or arms, 0, projecting from each inner side thereof. These frames A are set upon the foundation B, and the brick-work, masonry, or cement sides B are built up, forming a longitudinal passageway, with said frames A set at uniform distances apart.

A is the roof-plate.

D are the rails upon which the motor or carriage J runs, more specifically referred to hereinafter.

The troughs or pockets H are made semicircular or curved in cross-section, and two or more are made integral. The ends thereof are bent down, as at I, and, if desired, hooked,

as shown at 2". These pockets are clamped endto end by clamping-plates E, curved on top to receive them, and secured together by bolts G. These plates may be bolted directly to the frames A, as shown in Fig. 6; or the lower parts of said plates E may have curved edges, as at F, which, when the two plates are placed, respectively, on each side of the arm or support 0 and are clamped by bolts G, join the pocket sections together and secure them firmly to the frames A. By this method of joining the pocket-sections their abutting ends form no obstructions to the passage of a wire or cable, and insure a continuous curved pocket for any desired length, and the entire fitting can be done in a machine-shop prior to being laid in the ground.

Either the motor, which is propelled through the conduit, or the carriage J, which is drawn through, is provided with vertical supports K, having slots L. Through these slots an arm, M, is passed, and a nut or collar, N, rests against the outer side of one of the supports K. A collar, 0, is placed around the arm M and between the two supports K, and a clamping-nut, P, clamps the arm M firmly to said supports at any height desired, so that it may run above any desired pockets. This arm M is provided with eyes m, to secure the wires, cables, or ropes to, and the ends are provided with rollers or wheels It, to prevent them catching on the sides of the conduits If desired, the arms 0 may extend across from one upright to the other of the frame A, as indicated in dotted lines, Fig. 1.

Any form of adjustable arm M may be used in lieu of that shown, as the particular construetion is immaterial to my invention.

1 may use any number of pockets H, and the pockets may be made separate, or a series of them may be made integral; and one or 2 i s a 257,509

more series of pockets may be arranged one above the other.

Having now described my invention, what- I claim as new, and desire to secure by Letters Patent, is p 1. An underground conduit consisting of frames having supports for the wires, surrounded with brick work or cement, in combination with sheet-metal pocket-sections having their ends bent down, and clamping-plates to clamp said pocket-sections end to end, substantially as and for the purpose specified.

2. An underground conduit for electric wires, provided with frames A, having arms 0, in combination with pocket-sections H, clamping-plates E, and boltsG, substantially as and for the purpose specified.

3. The frame A, in combination with pocket-sections H, having bent ends I and clamping-plates to clamp said sections together, substantially as and for the purpose specified.

4. An underground conduit for electric wires, provided with a railway, in combination with a motor or carriage, J, provided with an adjustable arm immovable when once set, and adapted to be supported wholly by the motor above any desired layer of pockets or wire-sup ports, substantially as and for, the purpose specified.

5. An underground conduit for electric an adjustable arm furnished with wheels R on its ends, adapted to be supported above any desiredlayer of pockets or wire-supports, substantially as and for the purpose specified. I 6. In an underground conduit for electric wires, a railway, in combination with a railway carriage or motor, J, supports M, having slots K, arm M, and means to clamp said rod inany position on said supports, substantially as and for the purpose specified.

In testimony of which invention I hereunto set my hand. i

- JOSIAH S. DU BOIS. \Vitnesses:

WILLIAM MOWADE, R. M. HUNTER.

30 wires, provlded with a railway, in combina- Y .tlon with a motor or carriage, J, provided with 

